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Creators/Authors contains: "Usuba, Junichi"

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  1. ; ; ; ; (, Chemical Science)
    Photo-cycloadduct diazetidines exhibit high energy storage densities exceeding 0.3 MJ kg−1, offering long-term energy storage for up to 23 years and rapid solvent-assisted energy release. 
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    Free, publicly-accessible full text available November 20, 2025
  2. ; ; ; ; ; (, Communications Materials)
    Abstract Conventional topochemical photopolymerization reactions occur exclusively in precisely-engineered photoactive crystalline states, which often produces high-insoluble polymers. To mitigate this, here, we report the mechanoactivation of photostable styryldipyrylium-based monomers, which results in their amorphization-enabled solid-state photopolymerization and produces soluble and processable amorphous polymers. A combination of solid-state nuclear magnetic resonance, X-ray diffraction, and absorption/fluorescence spectroscopy reveals the crucial role of a mechanically-disordered monomer phase in yielding polymers via photo-induced [2 + 2] cycloaddition reaction. Hence, mechanoactivation and amorphization can expand the scope of topochemical polymerization conditions to open up opportunities for generating polymers that are otherwise difficult to synthesize and analyze. 
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  3. ; ; ; ; ; ; ; ; ; ; et al (, Chem)
    Free, publicly-accessible full text available November 1, 2025
  4. ; ; ; ; ; ; ; ; ; ; et al (, Journal of the American Chemical Society)
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  5. ; ; ; ; (, Chem)
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  6. ; ; ; ; ; (, Chemical Science)
    Visible-light-absorbing photoswitches based on the Azo-BF2scaffold show reversible isomerization in the solid state, storing photon energy and releasing thermal energy on demand. 
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    Full Text Available 
  7. ; (, Trends in Chemistry)
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  8. ; ; ; ; (, ACS Materials Au)